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Texas Instruments TI-1650

Date of introduction:  June 13, 1976 Display technology:  Fluorescent
New price:  $29.95, 19.95, DM 64.00 Display size:  8
Size:  4.9" x 2.8" x 0.65"
 125 x 70 x 16 mm3
   
Weight:  3.9 ounces, 110 grams Serial No:  310941
Batteries:  Custom made  Date of manufacture:  wk 34 year 1976
AC-Adapter:  AC9131 Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS1043
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-1650 and its sibblings TI-1600, TI-1680 were very flat calculators compared to the previous TI-1200 models. Only one year in front of the first pocket-sized LCD-calculators you could carry them in your shirt.

TI-1650_1.jpg (103165 Byte)Dismantling the TI-1600 or one of its sibbling is difficult, three small plastic locks have to be bent together in different directions.

TI-1650_PCB.jpg (117973 Byte)The technology behind the TI-1650 is similar to the TI-1265, instead of the normal 9V battery a very flat (custom made by french company SAFT) rechargable battery is used.

Sales figures kept low, soon after the TI-1650 the first LCD-calculators appeared on the market.



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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, December 5, 2001. No reprints without written permission.